I wouldn't say nobody. I never was thrilled with the current theme or characters and would like to see an updated theme that is intended to be more inclusive and diverse. Others in these threads have also stated this opinion. I'm not surprised they didn't make an impression, though. The problem is that a lot of these threads, and particularly the ones on Splash, tend to become echo chambers because people who don't want to hear different opinions bully the others into leaving or giving up by asking the same questions ad nauseam and not listening to the answers.
More significantly, Disney has all the information it needs as far as what people think. It is Disney that wants to retheme Splash Mountain.